Suppression of mutual coupling in wideband tree shaped fractal DRA array for MIMO applications

Trivedi, Kedar; Pujara, Dhaval

doi:10.23919/eucap.2017.7928844

Cited by 7 publications

(10 citation statements)

References 7 publications

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“…Higher the isolation and lower the envelope correlation coefficient (ECC) are important in MIMO systems [27].The ECC is in linked to the mutual coupling, and it is directly proportional to the mutual coupling between arrays. The ECC can be achieved using the far-field characteristics [28] of the radiating elements.…”

Section: Face-to-face Orientation Of Rdra Arraymentioning

confidence: 99%

Mutual coupling reduction in circularly polarized dielectric resonator MIMO antenna

Iqbal

Illahi

Sulaiman

et al. 2019

IJEECS

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In this article a novel circularly polarized (CP) rectangular dielectric resonator antennas (RDRA’s) array has been designed. A unique conformal feeding strip has been used to excite the RDRA’s having a distance of λ/2. Various techniques are investigated to reduce mutual coupling (MC). Different formations, comprise of reorientation of the antennas have been employed to suppress MC and to enhance CP bandwidth. By the unique orientation the mutual coupling has been reduced by ~ 14 dB. A broadband circular polarization over a bandwidth of ~ 18.8% in conjunction with an impedance matching bandwidth of ~ 11.3 % has been achieved. The design has been modeled and simulated using computer simulation technology (CST). Two different simulation techniques i.e. finite integration technique (FIT) and Finite element method (FEM) have been used to compute and validate the results respectively. A significant resemblance in results have been observed.

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Section: Face-to-face Orientation Of Rdra Arraymentioning

confidence: 99%

Mutual coupling reduction in circularly polarized dielectric resonator MIMO antenna

Iqbal

Illahi

Sulaiman

et al. 2019

IJEECS

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“…Because of the absence of side waves, as well as elevated radiation effectiveness, extreme gain, adjustable structure, and exciting mechanisms, dielectric resonators have become a viable alternative for MIMO antennas in recent years [ 1 ]. Only a limited investigation articles on MIMO DRA are available in the open literature [ 2 , 3 , 4 , 5 , 6 ]. A rectangular MIMO DRA for 4G applications has been proposed in ref.…”

Section: Introductionmentioning

confidence: 99%

“…A MIMO RDRA for 5G NR band applications was discussed in ref. [ 6 ]. However, all of the MIMO antennas mentioned above have only shown linear polarization (LP).…”

Section: Introductionmentioning

confidence: 99%

Mutual Coupling Reduction through Defected Ground Structure in Circularly Polarized, Dielectric Resonator-Based MIMO Antennas for Sub-6 GHz 5G Applications

et al. 2022

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This paper describes a singly-fed circularly polarized rectangular dielectric resonator antenna (RDRA) for MIMO and 5G Sub 6 GHz applications. Circular polarization was achieved for both ports using a novel-shaped conformal metal strip. To improve the isolation between the radiators, a “S” shaped defective ground plane structure (DGPS) was used. In order to authenticate the estimated findings, a prototype of the suggested radiator was built and tested experimentally. Over the desired band, i.e., 3.57–4.48 GHz, a fractional impedance bandwidth of roughly 36.63 percent (−10 dB as reference) was reached. Parallel axial ratio bandwidth of 28.33 percent is achieved, which is in conjunction with impedance matching bandwidth. Between the ports, isolation of −28 dB is achieved Gain and other far-field parameters are also calculated and found to be within their optimum limits

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“…The destructive ground structure (DGS) technique prevents the flow of coupled currents by etching slots. A periodic C‐shaped defect, 12 a fence‐type DGS, 13 and a multi‐slot isolating element 14 have been introduced to decrease the mutual coupling. However, DGSs may affect the radiation patterns of the backside.…”

Section: Introductionmentioning

confidence: 99%

Investigation of isolation enhancement and tune‐ability in patch antenna arrays

Yin

Wang

2022

Micro & Optical Tech Letters

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This paper reports the study of a tunable isolator based on a four-strip resonant structure to reduce the mutual coupling between two patch antennas. Unlike other decoupling structures with a fixed center decoupling frequency, this design provides tunable mutual coupling reduction frequency response and adjustable mutual coupling level by integrating a varactor diode into the strip isolator. This study investigates the effect of the position and capacitance of the varactor diode on mutual coupling. In addition to tuneability, the tunable four-strip resonator reduces the coupling level at all frequencies around 3.5 GHz by at least 6 dB to less than -28 dB without degrading the impedance bandwidth. Compared to the case with the four-strip resonator structure but without the varactor diode, the isolation is further improved by 2 dB or more. The measured results are consistent with the simulation results.

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Suppression of mutual coupling in wideband tree shaped fractal DRA array for MIMO applications

Cited by 7 publications

References 7 publications

Mutual coupling reduction in circularly polarized dielectric resonator MIMO antenna

Mutual coupling reduction in circularly polarized dielectric resonator MIMO antenna

Mutual Coupling Reduction through Defected Ground Structure in Circularly Polarized, Dielectric Resonator-Based MIMO Antennas for Sub-6 GHz 5G Applications

Investigation of isolation enhancement and tune‐ability in patch antenna arrays

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